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Diesel particulate filters (DPF) regeneration is required to remove accumulated particulate matter in DPF. High pressure drop across DPF triggers an active regeneration by the ECU to burn off the accumulated soot. In city driving such as in a small island as Malta, exhaust gas temperatures are not high enough for passive regenerations, and ECU active regeneration might fail due to short trips. The particulate loading quantity in DPF is beneficial information as it provides an estimate of the remaining mileage expectancy of the DPF. Many vehicles provide information on particulate filter loading quantity in the OBD data. However, since this parameter is not on the mandatory list, different manufacturers provide this loading parameter in different forms, e.g.: grams; percentage (%); remaining mileage; etc. Thus comparison of the loading quantity across different manufacturers is not straightforward.